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. Author manuscript; available in PMC: 2016 Dec 21.
Published in final edited form as: Curr Biol. 2015 Dec 10;25(24):3253–3259. doi: 10.1016/j.cub.2015.11.004

Figure 2. Binocular drift coordination.

Figure 2

Joint probability distributions for the instantaneous velocities of ocular drift in the two eyes. Colored lines represent iso-probability contours. The two columns refer to different conditions: (A) Natural head-free binocular viewing. (B) Head-fixed binocular viewing. In this latter condition, the subject's head was firmly immobilized by a bite-bar and a head-rest. The two rows show horizontal and vertical velocity components. In all panels, the solid and dashed lines represent the linear regression and the 45° diagonal, respectively. Average correlation and slope of the linear regression are reported in each panel. Data represent averages across N=4 observers. See Figure S2 for the results of similar analysis under monocular viewing.